What is Trenching Support, Excavation and Dredging

Trenching Support, Excavation and Dredging is the excavation of material from the seabed to form a channel, most commonly a prerequisite to cable or pipe lay operations. There are different methods currently used to create a trench, the techniques used are dependent on the seabed constituents:

Ploughing ● Jetting ● Dredging ● Mechanical Excavation ● Cutters

How can Utility ROV Services help with Subsea Trenching / Excavation / Dredging?

Utility ROV Services can provide a system suitable for smaller trenching projects or to support a larger operation. We have a selection of tools to cater for the variation of the seabed topography.

The Mass Flow Excavator (MFE) is a non-contact dredger/excavator. A propeller moves a high volume of water through a nozzle to concentrate it on a particular area of the seabed. This technique is most effective on sand and compacted clays.

The Jetting Unit provides a concentrated high pressure “jet” of water to shift more cohesive sediment.

The Clamshell & Tine Grab are both mechanical excavators suitable for heavy sediment or gravel respectively.

The advantage of the Utility ROV System is that all the tools are run from the same subsea platform, the tools are easily interchanged meaning that the most efficient method can always be utilized providing our customer with a one stop cost efficient solution.

Which industries can we assist with Trenching operations?

Offshore Wind ● Offshore Tidal and Wave ● Offshore Oil and Gas